Don't have many couples, but these two are easily my favorite.... Their names are Mars and Yen Zarik. Mars is grouchy, logical, and a genius (literally); Yen is kind, stylish, and a quick learner. Both are scientists, and both are very, very stubborn. They're so weird, but I think they're made for each other.
No, they are not elves. But they do have pointed ears, and they're not human. Long story.